MADISON, Wis. — The stepbrother of an autistic Mazomanie man who had been missing since June has been charged with killing him and burying his body.

At a news conference Tuesday, Dane County Sheriff Dave Mahoney said Matthew Graville was tortured and abused by his stepbrother who killed him, froze his body in a freezer and then buried it near Mazomanie last July.

Twenty-eight-year-old Jeffrey Vogelsberg is charged with first-degree intentional homicide and hiding a corpse. The sheriff said the 27-year-old Graville lived with his stepbrother in Mazomanie before Vogelsberg moved to Joint Base Lewis-McChord in Washington with his wife, who's in the Army.

The State Journal says sheriff's officials are also holding a relative who's accused of stealing from Graville's bank accounts. A third person is suspected of helping Vogelsberg hide the victim's body.